ARCHIVED REPORTS XR0008702 - Laserfiche WebLink

Home Browse Search

i Tosco Corporation,A Subsidiary of Phillips Petroleum Company 5 Tosco Service Station No 4409,1502 North El Dorado Street,Stockton,Cahforma May 29 2002 Toluene was detected in five samples at concentrations ranging from 0 044 mg/kg (MW- 9@75') to 50 mg/kg (MW-9@60') EthyIbenzene was detected in five samples at concentrations ranging from 0 045 mg/kg (MW-9@75') to 34 mg/kg (MW-9@60') Xylenes were detected in six samples at concentrations ranging from 0 035 mg/kg (MW-10 @30')to 210 mg/kg (MW-9@60') Methanol was detected in samples MW-9@60' and MW-10@80' at concentrations of 1,400 mg/kg and 62 mg/kg, respectively MtBE and all other fuel oxygenates analyzed were not reported above laboratory detection limits Soil analytical data is presented on Table 1 Certified laboratory analytical reports and chain- of custody documentation are presented in Attachment D Groundwater Analytical Results TPHg was detected in groundwater samples collected from wells MW-8, MW-9, and MW- 10 at concentrations of 2,300 gg/l, 22,000 gg/l, and 9,200 gg/l,respectively Benzene was detected in wells MW-8 and MW-9 at concentrations of 600 gg/l and 490 gg/l, respectively Toluene was detected in wells MW-8 and MW-9 at concentrations of 22 µg/l and 260 µg11, respectively Ethylbenzene was detected in wells MW-8, MW-9, and MW- 10 at concentrations of 78 gg/l, 1,100 gg/l, and 94 ggll, respectively Xylenes were detected in wells MW-8, MW-9, and MW-10 at concentrations of 19 gg/l, 3,600 µg/l, and 230 gg/l, respectively All other constituents, including MtBE and fuel oxygenates, were not reported above laboratory detection limits in groundwater samples collected from wells MW-8, MW-9, and MW-10 Groundwater analytical results are presented in Table 2 The certified laboratory analytical report and chain-of-custody documentation are presented in Attachment E Soil Cuttings and Purge Water i Soil cuttings generated during drilling activities were temporarily stored on-site and covered with plastic sheeting pending characterization and disposal Tim A Manley Trucking, a California-certified disposal contractor, transported the soil cuttings to the Forward Inc , landfill facility located in Manteca, California for disposal (landfill approval Number 1241) Water generated during steam cleaning, development, and sampling of the new wells was temporarily stored in State of California, Department of Transportation (DOT)-approved 55-gallon drums pending transport by the disposal contractor to an appropriate disposal or treatment facility 1\Tosco Markettng\4409\Reports\AsmtRpt doc